Manual: pamchannel

Pamchannel User Manual(1)			   General Commands Manual			   Pamchannel User Manual(1)

NAME
       pamchannel - extract channels from a PAM image

SYNOPSIS
       pamchannel [-infile=infile] [-tupletype=tupletype] [channum ...]

       Minimum	unique	abbreviation of option is acceptable.  You may use double hyphens instead of single hyphen to denote
       options.	 You may use white space in place of the equals sign to separate an option name from its value.

DESCRIPTION
       This program is part of Netpbm(1).

       pamchannel reads a Netpbm image as input and produces a PAM image as output, consisting	of  the	 indicated  channels
       (planes) of the input.

       Each  channum  argument	is the number of a channel of the input, with the first channel being zero.  The channels in
       the output are in the order of these arguments.

       The output is the same dimensions as the input, except that the depth is the number of channum arguments you  supply.
       The tuple type is a null string unless you specify the -tupletype option.

       This  program works on multi-image streams, producing a corresponding output stream.  But before Netpbm 10.32 (Febru‐
       ary 2006), it ignored every image after the first.

       pamstack does the opposite of pamchannel:  It takes multiple PAM or PNM images  as  input  and  stacks  their  planes
       (channels) on top of one another to yield a single PAM.

OPTIONS
       In  addition  to	 the  options common to all programs based on libnetpbm (most notably -quiet, see  Common Options ),
       pamchannel recognizes the following command line options:

       -infile infile
	      This specifies the input file, which defaults to Standard Input.	You may specify - to select  Standard  Input
	      explicitly.

	      This is a little unconventional for Netpbm programs, which usually have the input file specification as an ar‐
	      gument.  For pamchannel, the arguments are channel numbers.

       -tupletype tupletype
	      This specified the tuple type name to be recorded in the output.	You may use any string up to 255 characters.
	      Some programs recognize some names.  If you omit this option, the default tuple type name is null.

SEE ALSO
       pam(1) pamstack(1)

HISTORY
       pamchannel was new, along with the PAM format, in Netpbm 9.7 (August 2000).

DOCUMENT SOURCE
       This manual page was generated by the Netpbm tool 'makeman' from HTML source.  The master documentation is at

	      http://netpbm.sourceforge.net/doc/pamchannel.html

netpbm documentation				       10 January 2006				   Pamchannel User Manual(1)